ipv6: Use ip6_dst_hoplimit() instead of direct dst_metric() calls.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 4aed081..9b2d7bc 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1119,6 +1119,7 @@
 	}
 	return hoplimit;
 }
+EXPORT_SYMBOL(ip6_dst_hoplimit);
 
 /*
  *